A prosecutor or plaintiff can offer evidence of a defendant’s prior similar sexual crimes, but usually must give the defendant 15-day, pre-trial notice.

Actual Rules

Rule 413

(a) Permitted Uses. In a criminal case in which a defendant is accused of a sexual assault, the court may admit evidence that the defendant committed any other sexual assault. The evidence may be considered on any matter to which it is relevant.

(b) Disclosure to the Defendant. If the prosecutor intends to offer this evidence, the prosecutor must disclose it to the defendant, including witnesses’ statements or a summary of the expected testimony. The prosecutor must do so at least 15 days before trial or at a later time that the court allows for good cause.

(c) Effect on Other Rules. This rule does not limit the admission or consideration of evidence under any other rule.

(d) Definition of “Sexual Assault.” In this rule and Rule 415, “sexual assault” means a crime under federal law or under state law (as “state” is defined in 18 U.S.C. § 513) involving: (1) any conduct prohibited by 18 U.S.C. chapter 109A; (2) contact, without consent, between any part of the defendant’s body — or an object — and another person’s genitals or anus; (3) contact, without consent, between the defendant’s genitals or anus and any part of another person’s body; (4) deriving sexual pleasure or gratification from inflicting death, bodily injury, or physical pain on another person; or (5) an attempt or conspiracy to engage in conduct described in subparagraphs (1)–(4).

Rule 414

(a) Permitted Uses. In a criminal case in which a defendant is accused of child molestation, the court may admit evidence that the defendant committed any other child molestation. The evidence may be considered on any matter to which it is relevant.

(b) Disclosure to the Defendant. If the prosecutor intends to offer this evidence, the prosecutor must disclose it to the defendant, including witnesses’ statements or a summary of the expected testimony. The prosecutor must do so at least 15 days before trial or at a later time that the court allows for good cause.

(c) Effect on Other Rules. This rule does not limit the admission or consideration of evidence under any other rule.

(d) Definition of “Child” and “Child Molestation.” In this rule and Rule 415:

(1) “child” means a person below the age of 14; and

(2) “child molestation” means a crime under federal law or under state law (as “state” is defined in 18 U.S.C. § 513) involving: (A) any conduct prohibited by 18 U.S.C. chapter 109A and committed with a child; (B) any conduct prohibited by 18 U.S.C. chapter 110;(C) contact between any part of the defendant’s body — or an object — and a child’s genitals or anus; (D) contact between the defendant’s genitals or anus and any part of a child’s body; (E) deriving sexual pleasure or gratification from inflicting death, bodily injury, or physical pain on a child; or (F) an attempt or conspiracy to engage in conduct described in subparagraphs (A)–(E).

Rule 415

(a) Permitted Uses. In a civil case involving a claim for relief based on a party’s alleged sexual assault or child molestation, the court may admit evidence that the party committed any other sexual assault or child molestation. The evidence may be considered as provided in Rules 413 and 414.

(b) Disclosure to the Opponent. If a party intends to offer this evidence, the party must disclose it to the party against whom it will be offered, including witnesses’ statements or a summary of the expected testimony. The party must do so at least 15 days before trial or at a later time that the court allows for good cause.

(c) Effect on Other Rules. This rule does not limit the admission or consideration of evidence under any other rule.